我在这里张贴给任何想在此找到答案的人。
在JSP文件上，使用此链接
<<li><a href="/reportFetch?filePath=<%=file.getAbsolutePath()%>&fileName=<%=file.getName()%>" target="_top"><%=list[i]%></a><br>
并创建servlet
...import javax.activation.MimetypesFileTypeMap;import javax.servlet.annotation.WebServlet;import javax.servlet.http.HttpServlet;import java.io.*;import javax.servlet.ServletException;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;@WebServlet("/reportFetch")public class Report extends HttpServlet { private static final long serialVersionUID = 1L; protected void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException { String filePath = request.getParameter("filePath"); String fileName = request.getParameter("fileName"); MimetypesFileTypeMap mimeTypesMap = new MimetypesFileTypeMap(); String mimeType = mimeTypesMap.getContentType(request.getParameter("fileName")); response.setContentType(mimeType); response.setHeader("Content-disposition", "attachment; filename=" + fileName); OutputStream out = response.getOutputStream(); FileInputStream in = new FileInputStream(filePath); byte[] buffer = new byte[4096]; int length; while ((length = in.read(buffer)) > 0) { out.write(buffer, 0, length); } in.close(); out.flush(); } protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // TODO Auto-generated method stub }}
